When plan for the round Shikoku island, Dogo Onsen already in the list, mainly due to the public bath house. I mean the old one, that name one of the top 3 oldest onsen.
Being go inside alone while wife no want to go, walk from the onsen hotel we stay, and few minutes walk, then at the counter make the payment, then go inside. It is old fashion onsen inside, lot of people. While in the onsen, I recall for some of the scene i read from the famous Japanese writer Natsume Sōseki (1867–1916), novel Botchan, where the main character frequent visit here.
Due to near by the onsen shopping street, it consider one of the easy to access tourist destination without doubt.